Island



UNITED STATES PATENT OFFICE.

CHARLES POTTER, JR., OF WESTERLY, RHODE ISLAND.

OSCILLATING PRINTING-PRESS.

Speccaton of Letters Patent No. 17,449, dated June 2, 1857.

To all whom t may concern:

Be it known that I, CHARLES POTTER, Jr., of vVest'erly, county of Washington, and State of Rhode Island, have invented certain new and useful Improvements in Oscillating Printing-Presses; and I do declare the following to be a true and exact description thereof, reference being had to the accompanying drawings, in whichl Figure l, is a perspective view; Fig. 2, a vertical section showing the parts in position for receiving the sheet; Fig. 3, a section showing the parts in position after having delivered the sheet; and Fig. 4:, an elevation of the fly, the same letters referring to like parts in all the figures.

My invention consists in an improved method of regulating the impression, and also of feeding in and throwing out the sheets, and is applicable particularly to the press patented by Merwin Davis July 24th 1855.

The main features of the press are similar to those described in said Davis patent and in the drawings are representedas follows, viz: A, is the frame work of suitable shape to contain the parts; B, is the bed attached to the column B and made to oscillate from the center o by means of the crank o and connection o. D is the eccentric segment which gives the impression, operated by its pinion d, lever c, and the cam f. The inking apparatus is that described in said Davis7 specication and is not represented in the drawings.

The arrangement for adjusting the impression is constructed as fellows: There is a shaft g extending across the frame and supporting at each end a lever It, which is loose upon said shaft. These levers are of the second class, having their fulcra on the shaft g and supporting the bed B by its bearings o while the long arms of said levers are made adjustable by means of the screws z' and hand wheels 7c. Screws z' have their bearings upon lugs cast upon the frame. The advantages of this method are obviousviz., an easy, convenient and rapid adjustment of the impression, perfect-ly firm, not liable to get out of order, and not interfering with the proper action of the gears Z and e Fig. l.

In Mr. Davis arrangement the sheets are fed to the grippers by a sliding fingerboard to which they are placed by the per son feeding. More than a years experience in the use of these machines, has demonstrated among others the three following very serious objections to this mode, viz: The impossibility of getting a good register, much difficulty in inserting the sheets under the fingers and liability to derangement. All these objections are removed by my improved feeding apparatus which is as follows: The feed board Z extends inward to a point where it will clear the most prominent points of the bed and segment as they oscillate. At its inward end is an adjustable strip m, extending a little above its surface and serving as a guide for placing the sheets. Near its middle the feedboard is hinged and the lower portion is capable of being lifted upward a short distance by means of levers a and n on shaft o operated by the cam p on the crank shaft through lever p and connection p.

The manner of operation is as follows: The sheet being laid on the feed board to guide m or adjusted by points or other convenient method, as the segment D comes to the position shown in Fig. 2 the cam p operating through its levers raises the feed board until itnearly touches the segment, when it comes in Contact with a toe r on the gripper shaft and shuts the grippers onto the sheet, when the sheetis drawn in and impressed while the feed board recedes to its former position ready to receive another sheet.

In the arrangement described by Mr. Davis in his specification, the {iy was attached to the` column supporting the bed and had two motions, a vibration on its own axis and an oscillation in connection with the column to which it was attached. The objection to this method is the sheets are not laid evenly the place of deposit varying with every change of speed and at a slow speed the sheets would drop upon the floor, the resistance of the atmosphere not being suiiicient to hold them against the fly In my improved arrangement this objection is entirely obviated and the sheets are deposited evenly at all speeds. I make the hy in the peculiar form represented in Fig. 4, and attach it to the sides of the frame entirely independent of the bed or column. l/hile the impression is being given the fly is drawn up into position by means of the cam s (Fig. 3) through its lever 25 and connection t. Then it arrives at the proper point for receiving the sheet it remains stationary while the sheet slides down upon it7 then itfollows the sheet for ward until the segment or platen D arrives at thepoint shown in Fig. 3, when a toe upon the gripper shaft strikes the stop or tripper u and releases the sheet; at this moment the cam s lets go of the fly and the spring Z9 forces it down carrying the sheet to the flyboard fw. It will be seen that as the fly is thrown by a spring it will perform its downward motion always in the same time without reference to the speed of the press which insures the merits abovev mentioned.

As the foregoing object-ions have been fully and practically tested, so has the value of what I claim as my improvements been thoroughly demonstrated on presses of full size.

I do not wish to be understood as laying claim to any part of the invention of said Davis; neit-her do I claim lifting the feedboard for the purpose of carrying the sheet to the grippers independent of its application or adaptation as herein described;

neither do I claim actuating the fly by a 2. I claim the use and adaptation of the lifting feedboard Z for carrying the sheet to the grippers, when combined with the oscillating eccentric segment D.

3. I also claim operating the fly by the cam s when so constructed as to cause said fly to conform to the motions of the bed.

B and oscillating eccentric segment D as above fully set forth.

CHARLES POTTER, Jn.

Witnesses:

DAVID SMITH, WILLIAM P. CoY. 

